Error "Segment: Start (3) + length (1) - 1 exceeds text length (1)"

The arduino sending a string "010101" using by using bluetooth. i can see the program still running well at the back of the pop up message "Segment: Start (2) + length (1) - 1 exceeds text length (1)". 

How to get rid of this error ?? "Segment: Start (2) + length (1) - 1 exceeds text length (1)"

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Use the length block to test if rxstringstatus >= 3 before using the segment block.


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thank you for the reply... you solve my problem.. thank you

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